Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Surface wave dispersion."”.
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Seismic site characterization via joint modeling of horizontal-to-vertical spectral ratios and surface wave dispersion : developing and validating a geophysical tool for deciphering Quaternary stratigraphic architecture of the Monahans dune field, West Texas.
… Spectral Ratios (HVSR) and surface wave dispersion offer a cost-effective alternative to deciphering Quaternary architecture, but inverse models are subject to ambiguity and nonuniqueness. We jointly model HVSR and surface wave phase velocity dispersion measurements via …
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Seismic site characterization through joint modeling of complementary data functionals, with applications to Santo Domingo, Dominican Republic.
… to vertical spectral ratios (HVSR) and surface wave dispersion, performed via refraction microtremor (ReMi). Fitting of data functionals by synthetics is driven by global optimization. The products of this approach are shear wave velocity profiles for the subsurface, accompanied by …
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Applications of time series analysis to geophysical data
… of time series analysis to geophysical data. Surface wave dispersion along the Walvis Ridge, South Atlantic Ocean, is obtained by bandpass filtering the recorded seismogram in the frequency domain. The group velocity is anomalously low in the period range of 15-50 s, and formal inversion of …
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S-wave velocity structure beneath the Kaapvaal Craton from surface-wave inversions compared with estimates from mantle xenoliths
Results from two-station surface-wave inversions across the Archean Kaapvaal craton of southern Africa are compared with seismic velocities estimated from approximately 100 mantle xenoliths brought to the surface in kimberlite pipes. As the xenoliths represent a snapshot of the mantle at the time …
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Ambient seismic noise imaging using trans-dimensional and machine learning techniques with application to Borneo and Iceland
The exploitation of surface wave dispersion measurements from ambient seismic noise data for the purposes of Earth imaging has become increasingly common in recent years and has led to many discoveries that have changed or re-enforced our understanding of Earth structure and processes. At the same …
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Velocity and anisotropy structure of the Icelandic crust - An ambient seismic noise analysis
Measuring the travel times of seismic waves is one of the most important tools for uncovering Earth’s structure and dynamics. In recent years, the discovery that surface wave dispersion could be estimated from ambient noise has introduced new possibilities into the field of seismic imaging, such as …
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Multistation Methods for Geotechnical Characterization using Surface Waves
… with soil characterization methods based on surface wave propagation applied to geotechnical engineering purposes. This topic has gained much interest in the last decade because of the appealing possibilities given by non-invasive methods, which are at once very flexible and cost effective. …
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Advanced analysis of complex seismic waveforms to characterize the subsurface Earth structure
This thesis includes three major parts, (1) Body wave analysis of mantle structure under the Calabria slab, (2) Spatial Average Coherency (SPAC) analysis of microtremor to characterize the subsurface structure in urban areas, and (3) Surface wave dispersion inversion for shear wave velocity …
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Seismic studies of 3-D elastic and anelastic structure of crust and upper mantle in Western China
… are studied by travel times of seismic waves. Anelastic properties are generally studied by attenuation of seismic waves retrieved from seismic amplitudes. We use different seismic datasets, including surface-wave dispersion from ambient noise and earthquakes, teleseismic receiver …